I don't recommend fuel dumping. It always dumps fuel from one tank before another, which can leave your aircraft way off balance. Fuel is dumped this way:

1st - Left Tip - Reserve (2941.3 pounds)
2nd - Right Tip - Reserve (2941.3 pounds)
3rd - Left Aux - No 1 Tank (15564.1 pounds)
4th - Right Aux - No 4 Tank (15564.1 pounds)
5th - Left - No 2 Tank (27262.3 pounds)
6th - Right - No 3 Tank (27262.3 pounds)
7th - Center - Center Tank (68293.1 pounds)

You can imagine that once you have dumped the fuel in the Left Tank, the balance will be out by 27262.3 pounds (if they both had 100% of fuel) and it will lean to the right. I wish you could control the fuel dumping a bit better than that.

@crashbar - If I follow the instructions, which I gave you in my previous reply, all my engines continue to run.
I just finished doing a test and I deliberately ran out of fuel (I was on the ground at the time). I had the Center, Left and Right fuel tank pumps switched OFF and fuel was still being fed to all the engines, except for the Center fuel tank, which remained the same UNTIL all the fuel from ALL the other tanks had been consumed. I don't recall the fuel tanks/pumps behaving this way in v1.2.

Mark